xref: /freebsd/lib/msun/man/scalbn.3 (revision 388bf3b630addc15e6aa774d516241590a662bde)

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.\"     from: @(#)ieee.3	6.4 (Berkeley) 5/6/91
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.Dd March 4, 2005
.Dt SCALBN 3
.Os
.Sh NAME
.Nm scalbln ,
.Nm scalblnf ,
.Nm scalblnl ,
.Nm scalbn ,
.Nm scalbnf ,
.Nm scalbnl
.Nd adjust exponent
.Sh LIBRARY
.Lb libm
.Sh SYNOPSIS
.In math.h
.Ft double
.Fn scalbln "double x" "long n"
.Ft float
.Fn scalblnf "float x" "long n"
.Ft long double
.Fn scalblnl "long double x" "long n"
.Ft double
.Fn scalbn "double x" "int n"
.Ft float
.Fn scalbnf "float x" "int n"
.Ft long double
.Fn scalbnl "long double x" "int n"
.Sh DESCRIPTION
These routines return
.Fa x Ns \(**(2** Ns Fa n )
computed by exponent manipulation.
.Sh SEE ALSO
.Xr ieee 3 ,
.Xr math 3
.Sh STANDARDS
These routines conform to
.St -isoC-99 ,
and they implement the Scalb function recommended by
.St -ieee754 .
.Sh HISTORY
The
.Fn scalbn
and
.Fn scalbnf
functions appeared in
.Bx 4.3
and
.Fx 2.0 ,
respectively.
The
.Fn scalbln
and
.Fn scalblnf
functions first appeared in
.Fx 5.3 ,
and
.Fn scalblnl
and
.Fn scalbln
in
.Fx 5.5 .